I don't think a unique idea is necessarily required for a startup. It could be instead that you've identified an under serviced market niche. This could still be a very good startup idea.
At least that is a takeaway I would have.
It is not everything a VC might want to hear, but it is a positive.
Case in point, my YC idea. I spent loads of my free time on building a MVP, got praise for it, but I did not have a burning passion to solve that problem, or even any desire that I wanted to be in that space long term.